Computer Science (9-1) 0984

Choose a lesson, try the practice and explain the idea without your notes. Your study checks help you decide what to review.

1. 01

   Why computers represent data in binary

   Learn the method · Practise with help · Try it yourself · Apply the idea

   Not started
   LearnReview
2. 02

   Convert between denary and binary

   Learn the method · Practise with help · Try it yourself · Apply the idea

   Not started
   LearnReview
3. 03

   Use bit width and binary range

   Learn the method · Practise with help · Try it yourself · Apply the idea

   Not started
   LearnReview
4. 04

   Convert denary and hexadecimal

   Learn the method · Practise with help · Try it yourself · Apply the idea

   Not started
   LearnReview
5. 05

   Convert between binary and hexadecimal

   Learn the method · Practise with help · Try it yourself · Apply the idea

   Not started
   LearnReview
6. 06

   Add 8-bit binary integers and detect overflow

   Learn the method · Practise with help · Try it yourself · Apply the idea

   Not started
   LearnReview
7. 07

   Perform logical left binary shifts

   Learn the method · Practise with help · Try it yourself · Apply the idea

   Not started
   LearnReview
8. 08

   Perform logical right and repeated shifts

   Learn the method · Practise with help · Try it yourself · Apply the idea

   Not started
   LearnReview
9. 09

   Encode positive and negative integers in two’s complement

   Learn the method · Practise with help · Try it yourself · Apply the idea

   Not started
   LearnReview
10. 10

    Decode two’s complement and check its range

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
11. 11

    Represent text with ASCII and Unicode

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
12. 12

    Sample sound into binary

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
13. 13

    Represent digital images with pixels

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
14. 14

    Measure data in bits, bytes and binary prefixes

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
15. 15

    Calculate image and sound file sizes

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
16. 16

    Explain why data is compressed

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
17. 17

    Compare lossy and lossless compression

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
18. 18

    Encode repeated data with run-length encoding

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
19. 19

    Read the structure of a data packet

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
20. 20

    Explain packet switching and packet order

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
21. 21

    Compare serial and parallel transmission

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
22. 22

    Compare simplex, half-duplex and full-duplex

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
23. 23

    Choose a transmission method for a scenario

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
24. 24

    Explain how USB transmits data

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
25. 25

    Understand errors after data transmission

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
26. 26

    Use even and odd parity checks

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
27. 27

    Extend parity across a byte or block

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
28. 28

    Check transmitted data with a checksum and echo

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
29. 29

    Use check digits to catch data-entry errors

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
30. 30

    Recover transmitted data with ARQ

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
31. 31

    Explain why transmitted data is encrypted

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
32. 32

    Use symmetric encryption

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
33. 33

    Use public and private keys

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
34. 34

    Explain the role of the CPU and microprocessor

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
35. 35

    Identify the main CPU units and registers

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
36. 36

    Follow the address, data and control buses

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
37. 37

    Trace the fetch–decode–execute cycle

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
38. 38

    Compare CPU cores, cache and clock speed

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
39. 39

    Understand a CPU instruction set

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
40. 40

    Recognise embedded systems

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
41. 41

    Choose an input device

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
42. 42

    Choose an output device

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
43. 43

    Use sensors to capture physical data

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
44. 44

    Compare RAM and ROM as primary storage

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
45. 45

    Distinguish primary and secondary storage

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
46. 46

    Explain magnetic and optical storage

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
47. 47

    Explain solid-state flash storage

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
48. 48

    Explain virtual memory

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
49. 49

    Explain cloud storage

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
50. 50

    Compare cloud storage with local storage

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
51. 51

    Distinguish system and application software

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
52. 52

    Explain operating system functions

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
53. 53

    Trace the hardware–firmware–operating system stack

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
54. 54

    Recognise hardware and software interrupts

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
55. 55

    Handle interrupts with an interrupt service routine

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
56. 56

    Compare high-level and low-level languages

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
57. 57

    Use assembly language and an assembler

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
58. 58

    Explain how a compiler translates a program

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
59. 59

    Explain how an interpreter runs a program

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
60. 60

    Compare compilers and interpreters

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
61. 61

    Use an IDE to write and test programs

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
62. 62

    Distinguish the internet from the World Wide Web

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
63. 63

    Read the parts of a web address

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
64. 64

    Explain HTTP and HTTPS

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
65. 65

    Explain what a web browser does

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
66. 66

    Trace how a browser retrieves a web page

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
67. 67

    Explain session and persistent cookies

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
68. 68

    Describe digital currency and its uses

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
69. 69

    Trace how a blockchain tracks transactions

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
70. 70

    Recognise brute-force attacks and hacking

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
71. 71

    Explain data interception and DDoS attacks

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
72. 72

    Distinguish viruses, worms and Trojan horses

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
73. 73

    Distinguish spyware, adware and ransomware

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
74. 74

    Recognise phishing, pharming and social engineering

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
75. 75

    Use access levels, authentication and privacy settings

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
76. 76

    Apply anti-malware, updates and firewalls

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
77. 77

    Protect links and connections with safe habits

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
78. 78

    Trace an automated system's control loop

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
79. 79

    Apply automated control to a real scenario

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
80. 80

    Evaluate an automated system's trade-offs

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
81. 81

    Define robotics and identify a robot

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
82. 82

    Compare roles for robots in different sectors

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
83. 83

    Define artificial intelligence

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
84. 84

    Explain AI data, rules, reasoning and learning

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
85. 85

    Trace an expert system

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
86. 86

    Explain machine learning

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
87. 87

    Choose between an expert system and machine learning

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
88. 88

    Use the program development life cycle

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
89. 89

    Analyse a problem and its requirements

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
90. 90

    Decompose systems and problems

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
91. 91

    Describe algorithms with inputs, processes, outputs and storage

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
92. 92

    Design with structure diagrams

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
93. 93

    Represent algorithms with flowcharts

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
94. 94

    Write precise pseudocode

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
95. 95

    Total and count values

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
96. 96

    Find maximum, minimum and average values

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
97. 97

    Search a list with linear search

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
98. 98

    Sort a list with bubble sort

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
99. 99

    Validate data with range and type checks

    Learn the method · Practise with help · Try it yourself · Apply the idea

    Not started
    LearnReview
100. 100

     Validate length, presence and format

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
101. 101

     Use check digits to validate identification numbers

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
102. 102

     Verify entered data with visual and double-entry checks

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
103. 103

     Choose normal and abnormal test data

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
104. 104

     Test extreme and boundary values

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
105. 105

     Complete a trace table for an algorithm

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
106. 106

     Identify and correct algorithm errors

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
107. 107

     Write and amend an algorithm from a scenario

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
108. 108

     Declare variables and constants

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
109. 109

     Choose a basic data type

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
110. 110

     Read input and display output

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
111. 111

     Write a sequence with assignments

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
112. 112

     Use arithmetic, relational and logical operators

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
113. 113

     Select a branch with IF and CASE

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
114. 114

     Repeat a fixed number of times

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
115. 115

     Repeat while a condition is true

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
116. 116

     Run a loop at least once

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
117. 117

     Use totals and counts together

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
118. 118

     Handle strings with built-in operations

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
119. 119

     Use nested selection and iteration

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
120. 120

     Break a program into procedures

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
121. 121

     Return values from functions

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
122. 122

     Use local and global variables

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
123. 123

     Use DIV, MOD, ROUND and RANDOM

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
124. 124

     Make a program maintainable

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
125. 125

     Declare and use one-dimensional arrays

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
126. 126

     Process a one-dimensional array with a loop

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
127. 127

     Work with two-dimensional arrays

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
128. 128

     Store program data in files

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
129. 129

     Open, read, write and close files

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
130. 130

     Read fields and records in a database table

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
131. 131

     Turn storage requirements into fields

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
132. 132

     Choose text and character data types

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
133. 133

     Choose Boolean, numeric and date/time types

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
134. 134

     Validate database field values

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
135. 135

     Understand the purpose of a primary key

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
136. 136

     Choose a suitable primary key from a table

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
137. 137

     Read SELECT and FROM queries

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
138. 138

     Select only the fields a user needs

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
139. 139

     Filter records with WHERE

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
140. 140

     Combine filters with AND

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
141. 141

     Combine alternatives with OR

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
142. 142

     Sort query results in ascending order

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
143. 143

     Sort query results in descending order

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
144. 144

     Count matching records with COUNT

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
145. 145

     Add matching values with SUM

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
146. 146

     Trace the output of a SQL query

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
147. 147

     Complete a single-table SQL statement

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
148. 148

     Design and query a single-table database

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
149. 149

     Recognise standard logic gate symbols

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
150. 150

     Apply the NOT gate

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
151. 151

     Use AND and OR gates

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
152. 152

     Use NAND and NOR gates

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
153. 153

     Apply the XOR gate

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
154. 154

     List input combinations for truth tables

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
155. 155

     Evaluate Boolean expressions row by row

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
156. 156

     Translate a problem statement into a Boolean expression

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
157. 157

     Build a logic circuit from an expression

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
158. 158

     Build a circuit from a problem statement

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
159. 159

     Complete a truth table from a circuit

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
160. 160

     Write an expression from a circuit

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
161. 161

     Write an expression from a truth table

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
162. 162

     Complete a truth table from an expression

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
163. 163

     Derive a circuit from a truth table

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
164. 164

     Respect Boolean circuit limits

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
165. 165

     Connect statements, expressions, circuits and tables

     Learn the method · Practise with help · Try it yourself · Apply the idea

     Not started
     LearnReview
166. 166

     Unsigned binary representation

     Understand the idea · See an example · Check yourself

     Not started
     LearnReview
167. 167

     Phishing and authentication

     Understand the idea · See an example · Check yourself

     Not started
     LearnReview
168. 168

     Tracing loops and assignments

     Understand the idea · See an example · Check yourself

     Not started
     LearnReview

These checks record your study activity and self-assessment, not a mastery score. Check the course coverage map for available lessons and remaining topics.